+1 to those suggestions about shoes being too tight, or wearing too many socks to make it a tight fit. I took that suggestion a couple years ago...to just wear normal, not tight socks, and then maybe a shoe cover. When it's a tight fit the circulation is restricted which contributes to feeling cold. I actually just have a couple pairs of black socks that I pull on over the shoe. Sometimes I put a plastic back over the toe of the shoe before pull the sock over it...just to toe. Works are a windbreaker, but still can ventilate.

Dan